12210204531 has 8 divisors (see below), whose sum is σ = 18606025984. Its totient is φ = 6977259720.

The previous prime is 12210204497. The next prime is 12210204569. The reversal of 12210204531 is 13540201221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12210204531 - 2⁶ = 12210204467 is a prime.

It is a super-2 number, since 2×12210204531² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 581438311 = 12210204531 / (1 + 2 + 2 + 1 + 0 + 2 + 0 + 4 + 5 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 12210204498 and 12210204507.

It is not an unprimeable number, because it can be changed into a prime (12210204031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290719135 + ... + 290719176.

It is an arithmetic number, because the mean of its divisors is an integer number (2325753248).

Almost surely, 2^12210204531 is an apocalyptic number.

12210204531 is a deficient number, since it is larger than the sum of its proper divisors (6395821453).

12210204531 is an equidigital number, since it uses as much as digits as its factorization.

12210204531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581438321.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12210204531 its reverse (13540201221), we get a palindrome (25750405752).

The spelling of 12210204531 in words is "twelve billion, two hundred ten million, two hundred four thousand, five hundred thirty-one".